Fast, Reliable Bathroom Remodeling Across Fontana
Bathroom remodeling in Fontana typically runs $18,000 – $38,000 for a full gut-and-replace, with smaller refreshes starting around $9,000. Most projects in Fontana’s 1950s – 80s tract homes take two to four weeks once demo starts, though permit-driven upgrades can add time. Our team knows the housing stock here – single-story stucco ranches with aging plumbing and electrical – and we quote accordingly. Call (877) 658-7475 to schedule a free walkthrough and get a written line-item estimate.
Why Casita ADU Builders Is Fontana’s Preferred Bathroom Remodeling Company
We’re not a general contractor juggling kitchen remodels, room additions, and commercial jobs. Casita ADU Builders lives in the accessory dwelling and interior finish space. That means our Bathroom Remodeling team spends every week inside Fontana homes built between 1950 and 1985, working through the same framing, plumbing, and waterproofing conditions your house has. We know what’s behind the original tile before we open the wall, and we price for it honestly.
Led by Nolan Treffert, our crews work across all Fontana ZIP codes – 92335, 92336, 92337, and 92331 – from the older neighborhoods off Foothill Boulevard to the newer tracts toward Sierra Lakes. We’ve remodeled baths near Fontana High School, in the Southridge area, and down in the older blocks around Citrus Avenue. That repetition builds speed and accuracy. When a Fontana inspector asks for a load calculation on a 1962 ranch, we’ve already got the numbers ready.
Our Fontana clients get a fixed-price contract with written allowances for the hidden stuff – galvanized pipes, undersized framing, original panels. No vague “we’ll figure it out later” language. Every change order comes with photos and a signed approval before we proceed. That’s how you keep a gut remodel from turning into a mess.
Our Bathroom Remodeling Services in Fontana
Full Bathroom Remodels
A full remodel in a Fontana tract home usually means gutting to the studs, replacing the tub or shower, re-tiling, new vanity, new lighting, and updated plumbing and electrical. We do complete turnkey work – demo through paint – under one contract. No handing you off to a separate tile crew or plumbing subcontractor mid-project. For homes in the 92335 and 92336 ZIPs, we see a lot of original 5-foot tubs swapped for walk-in showers with proper waterproofing behind the walls.
Waterproofing and Tile Installation
The single most common failure we find in Fontana bathrooms is water intrusion behind original tile. 1960s and 70s builders often set tile on drywall with no waterproof membrane, and decades of steam and splashing rot the framing. We rebuild with cement board or foam backer, apply a waterproofing system behind the tile, and set tile with modified thin-set. This matters here – Fontana’s hot inland summers mean more showers, more steam, and more moisture cycling through the space.
Plumbing and Electrical Upgrades
Opening the walls in an older Fontana home almost always reveals galvanized supply lines that need replacing, and often a single-panel electrical service that can’t handle a modern bathroom circuit. We handle plumbing and electrical upgrades in-house as part of the remodel. But we’ll be direct: if your panel is original, expect the permit to trigger a load calculation and possibly a service upgrade. That conversation happens at the walkthrough, not after demo.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Fontana
Our Bathroom Remodeling work leans on materials that hold up in the Inland Empire climate. We install James Hardie fiber-cement backer in wet zones, and we regularly spec plumbing fixtures and waterproofing products from brands our Fontana customers recognize and trust. We keep common parts stocked locally for faster turnaround on mid-project changes. If you’re also planning a backyard unit, we can coordinate the bathroom remodel alongside an ADU from Abodu or a Tuff Shed conversion, so the interior and exterior finish work stays under one contract.
Common Bathroom Remodeling Problems We See in Fontana Homes
- Hidden galvanized plumbing. Original steel supply lines from the 1950s and 60s corrode from the inside out. Once we open the wall, the right fix is replacing them with PEX or copper – and that’s a change order we plan for with a written allowance before we start.
- Single-panel electrical service. Many Fontana ranch homes still run on the original 100-amp or even 60-amp panel. A modern bathroom with a vent fan, heated floor, and GFCI outlets can trigger a load calculation and panel upgrade.
- Failed waterproofing behind original tile. We’ve pulled tile off walls and found the drywall underneath soft to the touch. If the framing is rotted, we sister or replace it before any new tile goes up. Catching it at demo is cheaper than finding it after the new tile fails.
- Undersized 2×4 framing. Original headers and joists from the 1960s weren’t designed for today’s tile weight or larger openings. Fontana’s permit process often requires adding a proper header or sistering joists before we can close the wall – and we write that into the estimate up front.
Pricing for Bathroom Remodeling in Fontana, CA
In Fontana’s market, a cosmetic refresh – new vanity, toilet, lighting, paint, and re-glazed tub – runs $9,000 – $14,000. A full gut remodel with new tile, tub or shower, plumbing updates, and electrical work typically lands between $18,000 and $38,000. Adding a wet-zone rebuild with waterproofing and framing repairs pushes toward the top of that range. Permit fees in San Bernardino County add roughly $600 – $1,200 depending on scope, and we handle the permit package start to finish. Free estimates are standard – call (877) 658-7475 and we’ll walk your Fontana bathroom and give you a fixed, line-item quote.
We Also Serve Cities Near Fontana
While this page focuses on Bathroom Remodeling in Fontana, our crews regularly work in Fontana and the surrounding communities: Bloomington, Rialto, Glen Avon, and Pedley. If you’re in one of those cities and planning a bathroom remodel, the same Fontana team handles your job with the same local knowledge and the same pricing structure.
Serving Fontana, CA — Our Local Coverage Area
We’re based in the Fontana area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Bathroom Remodeling in Fontana
The three most common triggers are original galvanized supply lines, a single-panel electrical service that can’t handle added load, and undersized framing behind the original tile. That’s a direct answer. We plan for all three by writing allowances into your contract before demo starts – so when we open the wall and find a corroded vent stack or a rotted stud, you get photos, a fixed price, and a signed approval before we touch it. Call (877) 658-7475 to talk through what your specific home likely has behind the walls.
Yes, Fontana requires a building permit for any remodel that alters plumbing, electrical, or structural elements – which is almost every full bathroom remodel. If you’re in a 1950s – 70s tract home, expect the permit to trigger a load calculation on the original panel and possible structural review of the framing. We pull the permits, schedule the inspections, and handle correction items from the inspector. You don’t manage any of it. For an exact scope and cost, call (877) 658-7475.
We check the panel at the walkthrough and tell you honestly whether a service upgrade will be required. If the original 60-amp or 100-amp panel can’t support the new bathroom circuits, we write the upgrade into the contract as a defined line item, not a surprise. In some cases, we can add a subpanel; in others, the service needs replacing. Either way, you see the price and approve it before work starts. Call (877) 658-7475 for a free estimate.
We build wet zones the way they should have been built originally – cement board or foam backer over the studs, then a bonded waterproof membrane, then tile. That’s the approach we use on every Fontana remodel, because the original tile-on-drywall method fails here consistently, especially with long hot summers and repeated steam exposure. The old framing often needs repair before the new system goes in. Call (877) 658-7475 and we’ll show you exactly how we waterproof your shower.
Yes. This is what our company is built for – we run the ADU construction and the interior bathroom remodel under one contract, one schedule, and one inspection process. That means no second contractor, no coordination gaps, and no finger-pointing if a change order surfaces. If you’re adding a backyard unit with an Abodu or Tuff Shed build and want the primary-home bathroom done at the same time, that’s a normal scope for us. Call (877) 658-7475 and we’ll price both pieces together.
What Opening a Fontana Wall Actually Turns Up
Fontana’s post-WWII and 1960s – 70s tract homes share a consistent anatomy. The original builders used galvanized steel supply lines, single-panel electrical service, and 2×4 framing that barely meets today’s code. The moment we open a bathroom wall – especially in a home near Foothill Boulevard or south of the 10 near Citrus Avenue – we’re looking at one of three things: corroded pipes that need replacement, undersized framing that needs headers or sistered joists, or water-damaged studs behind original tile that never had a waterproof membrane.
That’s the single biggest reason a bathroom remodel quote in Fontana moves after demo. Not because the contractor was sloppy with the estimate, but because the house is sixty years old and nobody has looked inside the wall since it was framed. Our process handles this directly: inspection first, allowances written into the contract for plumbing, framing, and electrical unknowns, and any change order priced and approved in writing before we touch the wall. No open-ended “we’ll figure it out.” You know what you’re paying and why.
Our crew was remodeling a hall bath in a 1962 ranch house near Citrus Avenue when we opened the wall behind the tub and found the original galvanized supply lines had been spliced with copper, and the vent stack was cracked. We wrote a change order with photos and a fixed price, got approval the same day, and replaced the plumbing and added a proper vent before closing the wall with moisture-resistant drywall. That’s the kind of repair you’d miss on a superficial cosmetic job – and it’s the kind that fails the inspection later if it’s not done right.
Written by Nolan Treffert, Owner at Casita ADU Builders, serving Fontana and the surrounding Inland Empire communities.
Contact Casita ADU Builders for Your Fontana Bathroom Remodel
Ready to see what’s behind your Fontana bathroom walls? We’ll walk the space, check the panel and plumbing, and give you a fixed, line-item estimate with allowances for the hidden stuff. No pressure, no vague numbers. Call (877) 658-7475 to schedule your free estimate today. Whether your home is in Southridge, Sierra Lakes, or one of the older tracts off Citrus Avenue, we know what we’re walking into – and we’ll tell you straight.